/Engine/Source/Runtime/Engine/Public/SubtitleManager.h
HACK: Accept a movie subtitle and display it to all currently registered displays. This will not work with the old Canvas drawing system.
void SetMovieSubtitle ( [UObject](API\Runtime\CoreUObject\UObject\UObject) * SubtitleOwner, const [TArray](API\Runtime\Core\Containers\TArray)< [FString](API\Runtime\Core\Containers\FString) > & Subtitles )